Bobbin-winding apparatus for sewing-machines



R. DOUGLASS. aossm wmome APPARATUS FOR sswms MACHINES.

APPLICATION FILED APR-2|. I915.

Patented Aug. 9, 1921.

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RAY 'nouGLAss; on DEER PARK, NEW Yong."

i To all whom it may concern:

Be it known that I, RAY- DoUeLAss, a citizen of the United States, residing at Deer Park, in the county of Suffolk and State of New York, have invented new and useful Improvements in Bobbin-Winding Apparatus for Sewing-Machines, of which the following is a" specification. I

This invention relates to sewing machines. In the use of such machines bobbins are usually employed which are-operated by the mechanism ofxthe machine so'as to passthe thread through the loop formed by the needle. These bobbins must be wound with thread and may be wound when desired by" means for laying the thread on tlie bobbin.

Such machines usually include means for supporting a' spoollof thread rotatably and under normal conditions the thread is guided from the spool to-the needle bar of the machine. When it is desired to winda bobbin the thread from -the spool is not guided totheneedle bar but is guided to the attachment-referredto. With this ar rangement, although the. bobbin can be r wound automatically by themechanism; it

necessitates'additional labor in order to ac- One of the objects of this invention is'to provide means for effecting the automatlc winding of a bobbin on a sewing machine without interfering inany way with the normal sewing operation of'the machine; in other words to provide means for eli'ectingsimultaneously the normal sewing operation' andithe winding of thebobbin', y A further'obj ectof this invention isto provide' very "simple 'means foriefiecting the automatic winding of the bobbin.

A further object of the invention is to produce an attachment of very simple construction.which can be readily secured on the machine so-as to enable'it IiJObB'IlSEKl simultaneously to sew and to wind albobbin. The invention consists in the general combination of parts and details described in noBBnv-wmnme APPARATUS 7 non snwrnG-MAomnEs,

the following specification; all of which con- Specification of Letters I atent. Patented Aug. 9, 1921. I i

i 3 Application filed. April 21, 1915. Serial'No. 22,735; i i

tribute to produce 1 an efficient sewing machine, while'the broad'scope of theinvention is set forth in the appended claims. I

In the drawing: I V Figure 1 is a side elevation illustrating in outlinethe upper part of a sewing machine to which my invention is applied and indi cating the manner in which the sewing is accomplished and the simultaneous winding of a bobbin. a r

Fig. 2 is a perspective showing one emries a needle 5 through which the thread 6 is guided to form thestitehes. Substantially all sewing machines of this type have at some point onth'exhousing means for sup porting a spool from which thethread 6 is supplied. This means usually consists of a horizontal seat or boss 7 formed on thehousing and providedwith an upwardly'extending pintle 8 which is about as long asthe length of an ordinary spool. The spool which is to supplyithe thread is simply placed on the-boss 7 ,"its bore being received over thepintlet8 so that the spool is rotatably supported; "Such sewing machines i also usually have Fat the point indicateda I bobbin winding-mechanism 9. This bobbin winding mechanism is usually of very simple construction involvinga small worm 10 whic'hmay be rotated by meansofa small belt pulley 11 which rests against the round belt l2which drives the main spindle of the sewingmachine. The worm 10 "meshes with a worm wheel l l carrying a cam 15, g and" as the cam rotates with'the worm wheel it swings to and at the thread laying arm 16 which is -"pivotallymounted at 17. A I bobbin 18 may be detachably supported on the axis ofthe worm 10 so as to berotated whenthe worm rotates. The thread 19 100 passes through a suitable guide 20 near the pivot 17 and thenthrough a notch 21 atthe end of the arm 16. Accordingto my inven tion- Iprovide means for simultaneously rotatably supporting two spool'syone of which erably in a simple form adapted to be attached to the pintle 8. For this purpose I prefer to construct a carrier with a socket 23 at one end, and this is preferablyaccomw plished in a simple manner by forming the spool carrier of a simple split tube or spindle 24, preferably of resilient material such as steel or brass. The tube preferably has a slot or slit 25 which extends longitudinally throughout its entire length. The lower or socket end 23 of the spindle 24: is adapted to fit neatly over the spindle 8, see Fig. 1, and should fit tightly so as to exert a resilient grasp upon the pintle 8. At a suitable point on the spindle or tube 24 I prefer to provide means for supporting a second spool, which is preferably in the form of a plate or disk 26 which is rigidly attached to the tube, transversely thereto.

It is understood that in using the device the lower spool 27 is placed on the pintle 8 and then the attachment 22 is placed in position, after which the upper spool 28 is placed on the upper part of the spindle and supported on the guard 26. The thread 6 may be drawn off from the lower spool 27 while the thread 19-may be drawn off from the upper spool 28 and guided through the bobbin winding mechanism. In practising my invention it is evident that the bobbin winding operation may be'carried on simule taneously with the sewing operation. The bobbin winding attachment usually includes some means not illustrated for throwing the pulley 11 out of contact with the belt 12.,

IVhere the device is used with cotton thread, the part 26 may be in the form of a plain disk. If the device is used with silk thread, there is a tendency for the silk thread to slip on the disk as it comes from the upper spool 28. If this happens,the silk thread, as it comes off the spool 28 runs around the edge. of the disk and this tends to entangle it with the thread- 6 from the other spool. In order to overcome this, I prefer to provide some means for engaging the thread 19 and guiding it. This means preferably consists of a simple tooth or pro jection 29 which may, if desired, be formed integral with the disk 26 and simply bent up in some such manner as that illustrated in Fig. 2. a Since socket end 23 frictionally engages and is supported by spindle 8, the position of the attachment on the spindle can be readily adjusted to locate plate or disk 26 at any desired relation to the upper end ofthe needle-supply spool, it being understood that plate 26 is out of contact with the spool in order that the spool may be free to rotate during the thread-drawing action. To illustrate, Fig. 1 shows the lower end of the attachment extending into the spool approximately half the spool length.

Owing to the frictional engagement of tube and spindle, movements of the'needle-supply spool during thread-drawing will not be communicated to the attachment andhence cannot affect the operation of the bobbinsupply spool; nor will the movements ofthe bobbin-supply spool afiect the position of the attachment or cause its rotation. As a result neither spool can shift the position or the attachment, so that projection 29 will maintain the position in which it is placed and is'unaffected in any manner, insuring proper guiding of the thread.

. In practising my invention I do not limit myself to theme of all thenovel features together, but I mayruse any of the novel featuresseparately. It is understood that the emb'odimentof the invention set forth for supporting abobbin-supplyspool in sub 7 stantially axial alinemfent with the needlesupply spool, said meanscom'prising a split tube ,frictionally supported by the. spindle and having an intermediate spool-support ing plate of greater diameter than the spool 1 supported thereby and extending transverse to the axis of the tube, whereby sewing and bobbin-windingoperations may be had concurrently and movementsof the. needle supplyspool will be inelfectivetoproduce 1 plate movements. y 7 2. The combination withv a sewing ma chine headhaving a spool-holdingspindle, and a bobbin winder, of detachable means for supporting a'bobbin-supply spool in sub- 3' stantially axial alinement: with the needlesupply spool, said means comprising atube jfrictionally supported by the spindle and having .an intermediate spoolsupporting guard of greaterdiameter than the spool supported thereby, said guard carrying athread guide at its outer edge,;whereby sew ing and bobbin-winding operations may be had concurrently and movements of either spool during operation willbe ineffective to shift the'positi'on of the thread guide.

- 13'. A spool support forsewing machines having a, spo'ol holding spindle and a' bobbin winder,; comprising! a tube adapted to befrictionally supportedby the spindle and having an intermediate spool supporting guard extending 1 beyond the j base of the spool supported thereby, said guard carrying a thread guide at its outer edge, whereby sewing and bobbin winding operations may be had concurrently, and movements of either spool during operation will be ineffective to shift the position of the thread guide. i

In testimony whereof I have hereunto set my hand in presence of two subscribing W. F. NORTON R. W. ABBOTT. 

